GHSA-354h-gmhv-mr9c

### Impact An SSRF vulnerability in the webhooks feature allowed staff users to probe internal hosts from the Ghost server. ### Vulnerable versions This vulnerability is present in Ghost from v1.18.0 up to v6.27.0. ### Patches v6.27.0 contains a fix for this issue. ### How to update For self-hosters using Docker, find [Docker's official Ghost image here](https://hub.docker.com/_/ghost). Updating a Docker-based Ghost instance [is documented here](https://docs.ghost.org/install/docker#updating-ghost). If your Ghost is a Ghost-CLI install see our documentation on [updating it to the latest version here](https://docs.ghost.org/update). ### References Ghost thanks [0xkakash1](https://github.com/0xkakash1), [rooks00](https://github.com/rooks00), [l3tchupkt](https://github.com/l3tchupkt), [Wernerina](https://github.com/Wernerina), [email protected], and [Mohamed Bassia](https://github.com/0xBassia) for disclosing this vulnerability responsibly. ### For more information If you have any questions or comments about this advisory, email us at [[email protected]](mailto:[email protected]).